Stopping mechanism for looms



JuL s, 1934. Q PAYNE 1,965,155

STOPPING MECHANISM FOR LOOMS Filed April 4, 1932 4 SheetsSheet l &

VM M

July 3, 1934. O v PAYNE 1,965,155

STOPPING MECHANISM FOR LOOMS Filed April 4, 1932 4 SheetsSheet 2Z/T/VW7f0/$= 055/92? 1 7530149 0. V. PAYNE STOPPING MECHANISM FOR LOOMSJuly 3, 1934.

Filed April 4, 1932 4 Sheets-Sheet 3 kw Q o HWO/F/VWS y 1934' o. v.PAYNE STOPPING MEC HANISM FOR LOOMS Filed April 4, 1932- 4 Sheets-Sheet4 :2 Msw Sn M774 J71? VIA/70F 0504/? VF7/A/ JW Patented July 3, i934STATES STOPPING MECHANISM FOR LOOMS Oscar V. Payne, Worcester, Mass,assignor to Cromptcn & Knowles Loom Works, Worcester,

Mass a corporation of Massachusetts Application April 4, 1932, SerialNo. 603,166

11 Claims.

V This invention relates to means for stopping a loom before completeexhaustion of weft or filling. While capable of general application, theinvention is particularly designed for use in connection with loomshaving more than one shuttle, such as a 2 x 1 box loom.

It is the general object of the invention to provide mechanism forindicating substantial weft exhaustion in the active shuttle and forstopping the loom a predetermined number of picks after such indication.

The invention is shown and described herein as applied to a 2 x 1 loomin which each shuttle is alternately active for two successive picks,and in which it is desired to stop the loom with the indicated shuttleat the plain or single box end of the loom.

While applicable to a box loom using two or more shuttles, my inventiondoes not depend in any way on the shifting of the shuttle boxes or onany operation of the box mechanism, and may be used in a plain loom todelay loom stoppage for any desired number of picks.

My invention further relates to improved and simplified devices by whichthe described object may be attained, to arrangements and combinationsof parts which will be hereinafter described and more particularlypointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in whichFig. l is an end elevation of portions of a loom embodying myimprovements;

Fig. 2 is a side elevation of the pick-counting and contact mechanism,with the cover plate removed;

3 is an end view of the parts shown in Fig. 2 but with the cover platein position;

Fig. 4 is a view similar to Fig. 2 but showing the parts in re-set ornormal position;

Figs. 5 and 6 are detail sectional views, taken along the lines 5-6 and6-6 in Fig. 4 respectively;

Figs. 7, 8, 9 and 10 are views similar to Figs. 2 and 4 but showing theparts in additional relative positions;

Fig. 11 is an end view, looking in the direction of the arrow 11 in Fig.7;

Fig. 12 is a plan view, taken substantially along the line 12-12 in Fig.2;

Fig. 13 is a diagrammatic view showing the electrical connections, and

Fig. 14 is a detail sectional View, taken along the line 1414 in Fig. 2.

Referring to the drawings, I have shown portions of a loom including aloom frame 20, a lay 21, a shuttle S, a weft detecting mechanism D, acounting and contact mechanism C, a shipper lever 22 pivoted to the loomframe at 23, and a brake lever 24 pivoted to the loom frame at 25,

all of which parts, with the exception of the counting mechanism C, areof a usual commercial construction.

The weft detector is not shown in detail herein but comprises adetecting member 27 mounted in a casing 28 and positioned to extend intoa shuttle S and engage the weft or filling on a bobbin therein. Thedetecting member 27 is preferably of the side-slipping type and is soconstructed and supported that the detector 27 will slip sidewise,longitudinally of the bobbin in the shuttle S, upon the occurrence of aninsufiicient supply of weft on said bobbin.

The counting and contact mechanism C comprises a casing 30 mounted infixed position on the loom frame 20 and having a removable cover plate31. An actuating member 33 (Fig. 4) is provided with a solt 34 throughwhich loosely extends a stud 35 (Fig. 6) fixed in the casing 30. Themember 33 is yieldingly maintained in the rearward position shown inFigs. 2 and 4 by a spring 37, connected at one end to a pin 38 in theupper edge of the member 33 and connected at the other end to a pin 39fixed in the casing 30.

The outer end of the member 33 projects through a slot 40 in the rearedge of the casing 30 and normally rests upon the upper end of a support42, pivoted on a stud 43 threaded into the bottom of the casing 30. Acoil spring 44 (Fig. 14) is seated at one end in a pocket in tl e sideof the support 42 and at the other end in a depending portion 45 (Fig.5) of the casing 30 and yieldingly holds the support in operativeposition.

The member 33 is provided with notches 46 on its lower face and also hasa portion 47 extending beyond the pivot 35 and underlying a shoulder 48on a re-setting stud 49.

A holding bar 50 is also pivoted on the stud 35, but without endwiselost motion thereon, and is spaced from the member 33 by a washer 52(Fig. 6). The bar 50 is provided with holding notches 54 (Fig. 4) in itslower face and is normally depressed by a coil spring 55 (Fig. 6)mounted similarly to the spring 3'7 previously described.

A contact plate (Fig. 4) is mounted in the casing 30 but is suitablyinsulated therefrom and is connected by a wire W (Fig. 13) to a battery13 or other suitable source of current. A contact rod 63 (Fig. 4) ismounted in a block 64 slidable on a rod 65 fixed in the casing 30. Acoil spring 65 holds the block 64 yieldingly in the position shown inFigs. 2 and 4. The block 64 is provided with a single tooth 67 adaptedto engage the notches 46 and 54 previously described.

The re-setting stud 49 is provided with an arm '70 (Fig. 1) connected bya link '71 to a stud 72 in the shipper lever 22. When the shipper levermoves to the right in Fig. 1 on the stopping of the loom, the arm willmove clockwise, thus rocking the shoulder 48 from the position shown inFig. 4 to that shown in Fig. 2. Such movement causes the shoulder 48 toengage and depress the shoulder 47 of the actuating member 33 and thecorresponding portion 74 (Fig. 5) of the holding bar 50.

When the loom is started, the shoulder 48 is returned to the positionshown in Fig. 4, and the member 33 and bar 50 are released for downwardmovement by the springs 37 and 55. The bar 50 immediately swingsdownward to a position in which one of the notches 54 is engaged by thetooth 67 of the sliding block 64. The actuating member 33 wouldsimilarly move downward except for the fact that it is held in raisedposition by the support 42.

Upon indication of transfer by the weft detector 27, however, theforwardly extending end portion '75 (Fig. 14) of the detector 27 engagesthe forwardly extended portion of the support 42 and swings the sameabout its pivot 43 against the pressure of the spring 44, thus removingthe support 42 from its supporting position under the actuating member33, which member 33 then moves downward to the indicated position shownin Fig. '7, with its outermost notch 46 engaging the tooth 67.

A plate or bunter 80 (Fig. 1) is secured to the front of the lay 21 andmoves forward in position to engage the rear end of the member 33whenever the member 33 is in the lowered position indicated in Fig. 7.The plate 80, however, clears the member 33 when the member 33 is in theraised position indicated in Figs. 2 and 4.

The plate 80 engages the member 33 just before the lay reaches frontcenter and moves the member 33 forward a distance substantially equal tothe space between two successive notches on the member 33 or holding bar50. Consequently, as

a the lay moves forward after indication, the plate "80 engages themember 33 and moves the shdmg block 64 and contact bar 63 to theposition indicated in Fig. 8.

The block 64 is held in this position by the holding bar 50, while thelay and plate 80 thereafter move rearward. The actuating member 33 alsoreturns to its initial rearward position, in which position, however,the tooth 67 now engages the second notch in the member 33.

On the next forward movement of the lay, the

sliding block 64 is moved to the position shown in Fig. 9, and on thethird pick the block 64 is moved to the position shown in Fig. 10, inwhich the contact bar 63 engages the contact plate or member 60 and thusconnects the wire W through the loom frame to the ground.

Any suitable loom-stopping mechanism may be included in the circuit ofthe battery B and it is convenient to use for this purpose the stoppingmechanism of an electric warp stop motion, as indicated diagrammaticallyin Fig. 13. If the loom is not thus equipped, the battery B may beconnected through a magnet M to the ground, said magnet effectingloom-stoppage through devices of any usual kind and forming no part ofmy present invention.

The operation of my invention is believed to be clearly apparent fromthe foregoing description but may be briefly summarized as follows:

During the normal operation of the loom with a sufficient supply of weftin the active shuttle,

roealss the weft supply in the shuttle S becomes substantiallyexhausted, the detector 27 will slip sidewise, removing the support 42and allowing the actuating member 33 to swing downward to the positionshown in Figs. 7 and 11 and into position for engagement by the plate(Fig. 1)

Assuming that the shuttle S is in the plain or single box end of the laywhen indicated by the detector 27, the actuating member 33 will receiveits first forward movement by the plate 80 on the next pick, when theshuttle S is at the drop box end of the lay (Fig. 8). On the nextforward beat of the lay, the member 33 will receive its second forwardor counting movement from the plate 80, at which time the alternateshuttle will be at the plain end of the lay,

assuming that the shuttles become alternately ly the original indicatedshuttle S will be picked to the plain end of the lay, and the loom willbe stopped approximately at bottom center, with the shed open and withthe shuttle S conveniently positioned for replacement or replenishment.

By changing the number of teeth in the actuating member 33 and holdingbar 50, the number of picks intervening between indication and loomstoppage may be increased or decreased as desired. It will be noted thatmy improved loom stopping mechanism operates entirely independent of theusual filling stop motion and protector mechanism, and that the lay isbrought to rest through the action of the knock-off and brake mechanismas is usual upon an indication of warp breakage.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but what I claim is:

1. In a loom having one plain single-box end and having electricallycontrolled loom stopping mechanism, in combination, a weft detectormounted at said plain end, a circuit-closing device for said stoppingmechanism, and means to actuate said device to close said circuit aftera predetermined number of picks of the loom following indication ofsubstantial weft exhaustion by said weft detector.

2. In a loom having one plain single-box end to move saidcircuit-closing device in a series of steps to circuit-closing position,each step corresponding to one pick of the loom following indication ofsubstantial weft exhaustion by said weft detector.

3. In a loom having one plain single-box end and having electricallycontrolled loom stopping mechanism, in combination, a weft detectormounted at said plain end, a circuit-closing device for said stoppingmechanism movable in a series of steps to circuit-closing position, and1C0 means to move said device one step for each pick of the loomfollowing indication of weft exhaustion until contact is completed andthe loom is stopped.

4. In a loom having one plain single-box end and having loom stoppingmechanism, in combination, a weft detector, and means releasable therebyand effective to cause said stopping mech anism to operate, said meansincluding counting devices effective to delay the action of theloomstopping mechanism for a predetermined number of picks followingindication of substantial weft exhaustion, and said counting devicesincluding a sliding member, an actuator therefor, a spring opposingsliding movement of said member, a holding bar positively preventingreturn movement of said sliding member, and automatic means to rendersaid holding bar inoperative on loom stoppage.

5. In a loom having one plain single-box end and having loom stoppingmechanism, in combination, a weft detector, and means releasable therebyand effective to cause said stopping mechanism to operate, said meansincluding counting devices effective to delay the action of theloomstopping mechanism for a predetermined number of picks followingindication of substantial weft exhaustion and said counting devicescomprising a movable control device, a feed bar effective to advancesaid device step by step to operative position, said feed bar beingnormally maintained in stationary inoperative position, and meansmounted on the lay and engaging and moving said feed bar at each forwardbeat of the lay after indication of substantial weft exhustion.

6. In a loom having one plain single-box end and having loom stoppingmechanism, in combination, a weft detector, means releasable thereby andeffective to cause said stopping mechanism to operate, said meansincluding counting devices effective to delay such action of theloom-stopping mechanism for a predetermined number of picks followingindication of substantial weft exhaustion, and said counting devicescomprising a movable control device, a feed bar effective to move saiddevice step by step to operative position, said feed bar being normallymaintained in stationary inoperative position, means mounted on the layand engaging and moving said feed bar at each forward beat of the layafter indication of substantial weft exhaustion, and a holding barcooperating with said feed bar and preventing return movement of saidcontrol device until after loom-stoppage is effected.

'7. In a loom having one plain single-box end and having loom stoppingmechanism, in combination, a weft detector, means releasable thereby andeffective to cause said stopping mechanism to operate, said meansincluding counting devices effective to delay such action of theloom-stopping mechanism for a predetermined number of picks followingindication of substantial weft exhaustion, and said counting devicescomprising a movable control device, a feed bar efiective to move saiddevice step by step to operative position, means to move said feed barat each forward beat of the lay after indication of substantial weftexhaustion, a holding bar cooperating with said feed bar and preventingreturn movement of said control device until after loom-stoppage iseffected, and automatic means to release said feed bar and said holdingbar as the loom is stopped.

8. In a loom, loom stopping mechanism, a weft detector, an operatingelement fixed on the lay, an actuating device released by said weftdetector upon indication of substantial weft exhaustion and movable intothe path of said operating ele ment when thus released, and countingmeans effective to delay the operation of said loom-stopping mechanismfor a predetermined number of picks after the release of said actuatingdevice, said counting means comprising a sliding block having a singletooth, a feed bar having a plurality of notches and movable a limiteddistance endwise by said operating element as said element approachesfront center, a holding bar having a plurality of holding notches forsaid sliding block, a spring yieldingly opposing forward movement ofsaid block, and additional springs acting to press said feed and holdingbars toward said block.

9. In a loom, loom stopping mechanism, a weft detector, an operatingelement fixed on the lay, an actuating device released by said weftdetector upon indication of substantial weft exhaustion and movable intothe path of said operating element when thus released, and countingmeans effective to delay the operation of said loom-stopping mechanismfor a predetermined number of picks after the release of said actuatingdevice, said counting means comprising a sliding block having a singletooth, a feed bar having a plurality of notches and movable a limiteddistance endwise by said operating element as said element approachesfront center, a holding bar having a plurality of holding notches forsaid sliding block, a spring yieldingly opposing forward movement ofsaid block, additional springs acting to press said feed and holdingbars toward said block, and automatic means to free said bars from saidblock as the loom is stopped.

10. In a loom having one plain single-box end and having loom-stoppingmechanism, in combination, a weft detector, means effective to causesaid loom-stopping mechanism to operate, a device to actuate said lattermeans step by step, said device being normally maintained in stationaryinoperative position, an operating element fixed on the lay and normallyclearing said actuating device but engaging and moving said actuatingdevice on every forward movement of the lay after indication of weftexhaustion, and a member normally holding said actuating device out ofthe path of said operating element, said detector being directlyoperative to remove said member and to release said device uponindication of substantial weft exhaustion.

11. In a loom, loom stopping mechanism, a weft detector, an operatingelement fixed on the lay, an actuating device normally maintained instationary inoperative position, said actuating device being released bysaid weft detector upon indication of substantial weft exhaustion andbeing movable into the path of said operating element when thusreleased, said operating element engaging and moving said actuatingdevice on every forward movement of the lay after indication ofsubstantial weft exhaustion, and counting means effective to delay theoperation of said loom-stopping mechanism for a predetermined number ofpicks after the release of said actuating device.

OSCAR V. PAYNE.

